Why Does the Sun Brighten with Time

question 59

Multiple Choice

Why does the Sun brighten with time?

• A) as time progresses, helium starts to fuse in the core, in addition to hydrogen, leading to an increase in brightness
• B) as hydrogen is converted into helium in the core, the number of hydrogen nuclei decreases, decreasing the fusion rate. To maintain the balance with gravity pressing inward, the core compensates by shrinking and heating up
• C) as time progresses, more and more heat is trapped inside the core, leading to an increase in brightness
• D) as hydrogen is converted into helium in the core, the number of hydrogen nuclei decreases, decreasing the fusion rate. To maintain the balance with gravity pressing inward, the core compensates by expanding and cooling

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Definitions:

Edo

The historical name for Tokyo during the period from 1603 to 1868, when it was the seat of the Tokugawa shogunate in Japan.

Hokusai

A Japanese artist, ukiyo-e painter, and printmaker of the Edo period, known for the iconic woodblock print series "Thirty-Six Views of Mount Fuji".

Prussian Blue

A dark blue pigment used in paints and inks, chemically known as iron(III) hexacyanoferrate, and historically significant for its role in art and industry.

Receding Perspective

A technique in art that creates the illusion of depth and distance within a flat surface, making objects appear farther away as they diminish in size.